^○Yu Wakimoto¹, Masahiro Zenitani², Atsushi Fukui¹, Takaharu Oue², Hiroaki Shibahara¹ (1.Department of Obstetrics and Gynecology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan, 2.Department of Pediatric Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan)